Assault weapons are illegal. AR-15 while not an assault weapon by an operational definition it is one deadly weapon and probably should not be in the hands of civilians.
A semi-auto rifle with any ammo is just as deadly...ARs are being picked on because they're scary looking to ignoramuses.
When the 2nd Amendment was written our forefathers did not anticipate the powerful guns we would create. I am all for protection but ARs are simply not necessary for the general public IMO. You should still be able to own one but only if you get special permission.
The same could be said for speech. When the first amendment was written, the forefathers did not anticipate that a person would have the power to write something that literally half the world could read within seconds.
Maybe we should require special permission to post on social media since cyber bullying leads to suicide for far too many. Stop the carnage!